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package org.eclipse.jdt.core;
/*
* (c) Copyright IBM Corp. 2000, 2001.
* All Rights Reserved.
*/
import org.eclipse.jdt.internal.compiler.env.IConstants;
/**
* Utility class for decoding modifier flags in Java elements.
* <p>
* This class provides static methods only; it is not intended to be
* instantiated or subclassed by clients.
* </p>
*
* @see IMember#getFlags
*/
public final class Flags {
/**
* Not instantiable.
*/
private Flags() {}
/**
* Returns whether the given integer includes the <code>abstract</code> modifier.
*
* @param flags the flags
* @return <code>true</code> if the <code>abstract</code> modifier is included
*/
public static boolean isAbstract(int flags) {
return (flags & IConstants.AccAbstract) != 0;
}
/**
* Returns whether the given integer includes the indication that the
* element is deprecated (<code>@deprecated</code> tag in Javadoc comment).
*
* @param flags the flags
* @return <code>true</code> if the element is marked as deprecated
*/
public static boolean isDeprecated(int flags) {
return (flags & IConstants.AccDeprecated) != 0;
}
/**
* Returns whether the given integer includes the <code>final</code> modifier.
*
* @param flags the flags
* @return <code>true</code> if the <code>final</code> modifier is included
*/
public static boolean isFinal(int flags) {
return (flags & IConstants.AccFinal) != 0;
}
/**
* Returns whether the given integer includes the <code>native</code> modifier.
*
* @param flags the flags
* @return <code>true</code> if the <code>native</code> modifier is included
*/
public static boolean isNative(int flags) {
return (flags & IConstants.AccNative) != 0;
}
/**
* Returns whether the given integer includes the <code>private</code> modifier.
*
* @param flags the flags
* @return <code>true</code> if the <code>private</code> modifier is included
*/
public static boolean isPrivate(int flags) {
return (flags & IConstants.AccPrivate) != 0;
}
/**
* Returns whether the given integer includes the <code>protected</code> modifier.
*
* @param flags the flags
* @return <code>true</code> if the <code>protected</code> modifier is included
*/
public static boolean isProtected(int flags) {
return (flags & IConstants.AccProtected) != 0;
}
/**
* Returns whether the given integer includes the <code>public</code> modifier.
*
* @param flags the flags
* @return <code>true</code> if the <code>public</code> modifier is included
*/
public static boolean isPublic(int flags) {
return (flags & IConstants.AccPublic) != 0;
}
/**
* Returns whether the given integer includes the <code>static</code> modifier.
*
* @param flags the flags
* @return <code>true</code> if the <code>static</code> modifier is included
*/
public static boolean isStatic(int flags) {
return (flags & IConstants.AccStatic) != 0;
}
/**
* Returns whether the given integer includes the <code>strictfp</code> modifier.
*
* @param flags the flags
* @return <code>true</code> if the <code>strictfp</code> modifier is included
*/
public static boolean isStrictfp(int flags) {
return (flags & IConstants.AccStrictfp) != 0;
}
/**
* Returns whether the given integer includes the <code>synchronized</code> modifier.
*
* @param flags the flags
* @return <code>true</code> if the <code>synchronized</code> modifier is included
*/
public static boolean isSynchronized(int flags) {
return (flags & IConstants.AccSynchronized) != 0;
}
/**
* Returns whether the given integer includes the indication that the
* element is synthetic.
*
* @param flags the flags
* @return <code>true</code> if the element is marked synthetic
*/
public static boolean isSynthetic(int flags) {
return (flags & IConstants.AccSynthetic) != 0;
}
/**
* Returns whether the given integer includes the <code>transient</code> modifier.
*
* @param flags the flags
* @return <code>true</code> if the <code>transient</code> modifier is included
*/
public static boolean isTransient(int flags) {
return (flags & IConstants.AccTransient) != 0;
}
/**
* Returns whether the given integer includes the <code>volatile</code> modifier.
*
* @param flags the flags
* @return <code>true</code> if the <code>volatile</code> modifier is included
*/
public static boolean isVolatile(int flags) {
return (flags & IConstants.AccVolatile) != 0;
}
/**
* Returns a standard string describing the given modifier flags.
* Only modifier flags are included in the output; the deprecated and
* synthetic flags are ignored if set.
* <p>
* The flags are output in the following order:
* <pre>
* <code>public</code> <code>protected</code> <code>private</code>
* <code>static</code>
* <code>abstract</code> <code>final</code> <code>native</code> <code>synchronized</code> <code>transient</code> <code>volatile</code> <code>strictfp</code>
* </pre>
* This is a compromise between the orders specified in sections 8.1.1,
* 8.3.1, 8.4.3, 8.8.3, 9.1.1, and 9.3 of the <em>The Java Language
* Specification, Second Edition</em> (JLS2).
* </p>
* <p>
* Examples results:
* <pre>
* <code>"public static final"</code>
* <code>"private native"</code>
* </pre>
* </p>
*
* @param flags the flags
* @return the standard string representation of the given flags
*/
public static String toString(int flags) {
StringBuffer sb = new StringBuffer();
if (isPublic(flags)) sb.append("public "/*nonNLS*/);
if (isProtected(flags)) sb.append("protected "/*nonNLS*/);
if (isPrivate(flags)) sb.append("private "/*nonNLS*/);
if (isStatic(flags)) sb.append("static "/*nonNLS*/);
if (isAbstract(flags)) sb.append("abstract "/*nonNLS*/);
if (isFinal(flags)) sb.append("final "/*nonNLS*/);
if (isNative(flags)) sb.append("native "/*nonNLS*/);
if (isSynchronized(flags)) sb.append("synchronized "/*nonNLS*/);
if (isTransient(flags)) sb.append("transient "/*nonNLS*/);
if (isVolatile(flags)) sb.append("volatile "/*nonNLS*/);
if (isStrictfp(flags)) sb.append("strictfp "/*nonNLS*/);
int len = sb.length();
if (len == 0) return ""/*nonNLS*/;
sb.setLength(len-1);
return sb.toString();
}
}
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